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- W2574963563 abstract "Polarimetry plays an important role in the measurement of solar magnetic fields. We developed a high-sensitivity and high-accuracy polarimeter (HHP) based on nematic liquid crystal variable retarders (LCVRs), which has a compact setup and no mechanical moving parts. The system design and calibration methods are discussed in detail. The azimuth error of the transmission axis of the polarizer as well as the fast axes of the two LCVRs and the quarter-wave plate were determined using dedicated procedures. Linearly and circularly polarized light were employed to evaluate the performance of the HHP. The experimental results indicate that a polarimetric sensitivity of better than can be achieved by using a single short-exposure image, while an accuracy on the order of 10−5 can be reached by using a large number of short-exposure images. This makes the HHP a high-performance system that can be used with a ground-based solar telescope for high-precision solar magnetic field investigations." @default.
- W2574963563 created "2017-01-26" @default.
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- W2574963563 date "2017-01-01" @default.
- W2574963563 modified "2023-10-16" @default.
- W2574963563 title "Design and calibration of a high-sensitivity and high-accuracy polarimeter based on liquid crystal variable retarders" @default.
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- W2574963563 doi "https://doi.org/10.1088/1674-4527/17/1/8" @default.
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